Nielsen Hayden genealogy
Owain ap Maredudd ab Owain ap Gruffudd
- 1275(
= Descendancy chart to this point, 
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- 1 Owain ap Maredudd ab Owain ap Gruffudd [1] d. 15 Aug 1275
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- 2 Llywelyn ab Owain ap Maredudd ab Owain [1.1] d. 1309
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- 3 Thomas ap Llewellyn ab Owain ap Maredudd [1.1.1] d. 1343
- Elinor ferch Maredudd
- 4 Margred ferch Thomas [1.1.1.1]
[ =>]
- 4 Margred ferch Thomas [1.1.1.1]
- 3 Thomas ap Llewellyn ab Owain ap Maredudd [1.1.1]
- 2 Llywelyn ab Owain ap Maredudd ab Owain [1.1]